Digital pointer drive unit based on can bus

Abstract

The invention discloses a digital pointer driving component based on a CAN bus. The digital pointer driving component comprises shell, a shell cover, an instrument stepper motor body, a PCB, an ARM chip, a micro step subdivision driver chip, a CAN bus socket, a CAN bus transceiver controller and a logic circuit; and the digital pointer driving component is characterized in that a mechanism havingtwo-phase excitation coil drive and three-stage reduction gear transmission is arranged in the instrument stepper motor body, the PCB, a micro step subdivision driver circuit and a CAN bus control logic are all packaged in a space defined by the hexagonal shell and the shell cover, the PCB is used as a partition, the circuit control logic and the circuit are integrated on one side, components of the instrument stepper motor body are integrated on the other side, the interface logic is simple, only one output pointer and one four-core CAN bus socket are needed, a gate device driven by the digital pointer is formed, and a digital pointer indicating node based on the CAN bus is easily formed.

Description

technical field [0001] The invention relates to a digital pointer driving component based on CAN bus, which belongs to a key special device for digital pointer driving using CAN vehicle local bus, and is mainly used in CAN bus intelligent digital instruments and electric vehicle digital combination meters based on CAN bus , new medical equipment and industrial automation control fields. Background technique [0002] Traditional electromagnetic analog pointer instruments use a sensitive hairspring as a damping component, use electromagnetic torque to drive the pointer to rotate, output the pointer driving force in the form of a moving magnetic coil, and cooperate with the analog scale dial to indicate the current reading of the measured physical quantity. Although the electromagnetic analog pointer watch has the effect of smooth pointer movement, the hairspring of the damping part is very fragile, and inherently has the disadvantages of being afraid of vibration and high fail...

AI Technical Summary

Problems solved by technology

Although subdivision control technology is the main control method that can effectively reduce the vibration and noise of the stepper motor when it is running, the biggest disadvantage is that it needs to be solved by adding a subdivision drive circuit, which actually increases its hardware overhead.

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